256255804872 has 40 divisors (see below), whose sum is σ = 717753529350. Its totient is φ = 85418601408.

The previous prime is 256255804867. The next prime is 256255804957. The reversal of 256255804872 is 278408552652.

256255804872 is a `hidden beast` number, since 2 + 5 + 6 + 2 + 558 + 0 + 4 + 87 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 130808082276 + 125447722596 = 361674^2 + 354186^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 197727597 + ... + 197728892.

Almost surely, 2^256255804872 is an apocalyptic number.

It is an amenable number.

256255804872 is an abundant number, since it is smaller than the sum of its proper divisors (461497724478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256255804872 is a wasteful number, since it uses less digits than its factorization.

256255804872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395456507 (or 395456494 counting only the distinct ones).

The product of its (nonzero) digits is 10752000, while the sum is 54.

The spelling of 256255804872 in words is "two hundred fifty-six billion, two hundred fifty-five million, eight hundred four thousand, eight hundred seventy-two".